The 1980 outburst of 4U 0115+63 /V635 Cassiopeiae/
1983; IOP Publishing; Volume: 266; Linguagem: Inglês
10.1086/160828
ISSN1538-4357
AutoresG. A. Kriss, L. R. Cominsky, Ronald A. Remillard, Gavin J. Williams, J. R. Thorstensen,
Tópico(s)Astronomical Observations and Instrumentation
Resumoview Abstract Citations (58) References (30) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The 1980 outburst of 4U 0115+63 (V635 Cassiopeiae). Kriss, G. A. ; Cominsky, L. R. ; Remillard, R. A. ; Williams, G. ; Thorstensen, J. R. Abstract Optical observations of the proposed Be companion star (V635 Cas) to the hard transient X-ray pulsar 4U 0115+63 are presented and are used to predict the December 1980 X-ray outburst. It is found that V635 Cas increased in brightness by 1.7 magnitudes over the three months preceeding the X-ray outburst, and strong, variable H-alpha emission was always present. These results are shown to demonstrate that increased optical activity in the Be companion star can lead directly to a hard transient X-ray outburst. A delay of approximately 60 days is found between the onset of optical activity and the X-ray outburst. Direct accretion from a stellar wind can be ruled out due to this delay and the absence of orbital modulation of the 1980 X-ray outburst. It is suggested that the delay represents the time for material near the X-ray source to form an accretion disk and move inward toward the neutron star surface. Publication: The Astrophysical Journal Pub Date: March 1983 DOI: 10.1086/160828 Bibcode: 1983ApJ...266..806K Keywords: B Stars; Binary Stars; Pulsars; Stellar Mass Accretion; X Ray Sources; Accretion Disks; Cassiopeia Constellation; Companion Stars; H Alpha Line; Light Emission; Neutron Stars; Stellar Spectrophotometry; Astrophysics full text sources ADS | data products SIMBAD (1)
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